A reflex test of the knee is the basis for the term knee-jerk reaction.. A knee-jerk reaction is typically impulsive in nature and doesn't allow for someone to think things through. An outburst of anger is an example of a knee-jerk reaction.
As Figure 1 shows, the central processing unit consists of two parts: The control unit and the arithmetic/logic unit. Each part has a specific function. Before we discuss the control unit and the arithmetic/logic unit in detail, we need to consider data storage and its relationship to the central processing unit.
The central processing unit is the most important hardware component of a computer system. It is also known as the CPU, the central processor or instruction processor, and the main microprocessor in a microcomputer. computer is system of hardware devices organized according to the following system functions. 1  Input. 2  The input devices of a computer system include keyboards, touch screens, pens, electronic mice, optical scanners, and so on.